hmm Mabye as an alternative to what others are saying try:

half giant
scout 5/Pyrokineticist 10/Swordsage5
Not in any perticular order


That way you are shooting 10d6 flame bolts with pyrokineticist. you get some menuvers from swordsage, (desert wind any one)

You could totally pimp out the fire dmg.

I'm sure theres some other ones as well but with that build above
At level 10
you shooting(if you move 10ft, 20 ft if you take improve skirmish)
5d6 + 2d6(4d6 with imrpved scirmish) damage a round
thats not bad. I meen it's no uber charger or other brokenness but chucking
9d6 in a round isn't that bad.

Never mind it also adds some versitility with weapon afire and fire lash and what not.